Rohde & Schwarz 1094.0006.50, Operating Manual

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Remote Control CTS55
1094.0006.55 11.4 E-5
SOURce
POWer AM FM
MODE INTernal EXTernal STATe POLarity
POLarity COUPling
Fig. 11-1 Tree structure of the SCPI command systems using the SOURce system by way of example
Some key words occur in several levels within one command system. Their
effect depends on the structure of the command, that is to say, at which
position in the header of a command they are inserted.
Example:
SOURce:FM:POLarity NORMal
This command contains key word POLarity in the third
command level. It defines the polarity between modulator and
modulation signal.
SOURce:FM:EXTernal:POLarity NORMal
This command contains key word POLarity in the fourth
command level. It defines the polarity between modulation
voltage and the resulting direction of the modulation only for the
external signal source indicated.
Optional key words: Some command systems permit certain key words to be optionally inserted
into the header or omitted. These key words are marked by square
brackets in the description. The full command length must be recognized
by the instrument for reasons of compatibility with the SCPI standard.
Some commands are considerably shortened by these optional key words.
Example:
[SOURce]:POWer[:LEVel][:IMMediate]:OFFSet 1
This command immediately sets the offset of the signal to 1
volt. The following command has the same effect:
POWer:OFFSet 1
Note: An optional key word must not be omitted if its effect is specified
in detail by a numeric suffix.